1.AD为△ABC的角平分线,直线MN⊥AD于A.E为MN上一点,△ABC周长记为 ,△EBC周长记为 .求证 > .帮忙啊,各位.偶感激不尽.
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![1.AD为△ABC的角平分线,直线MN⊥AD于A.E为MN上一点,△ABC周长记为 ,△EBC周长记为 .求证 > .帮忙啊,各位.偶感激不尽.](/uploads/image/z/8579203-43-3.jpg?t=1.AD%E4%B8%BA%E2%96%B3ABC%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%2C%E7%9B%B4%E7%BA%BFMN%E2%8A%A5AD%E4%BA%8EA.E%E4%B8%BAMN%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E2%96%B3ABC%E5%91%A8%E9%95%BF%E8%AE%B0%E4%B8%BA+%2C%E2%96%B3EBC%E5%91%A8%E9%95%BF%E8%AE%B0%E4%B8%BA+.%E6%B1%82%E8%AF%81+%EF%BC%9E+.%E5%B8%AE%E5%BF%99%E5%95%8A%2C%E5%90%84%E4%BD%8D.%E5%81%B6%E6%84%9F%E6%BF%80%E4%B8%8D%E5%B0%BD.)
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